Bicycle helmet



FIG. 1 is a top perspective view of a bicycle helmet in an operational condition showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a top perspective view of a second embodiment thereof, shown in a collapsed condition;

FIG. 10 is a bottom perspective view of FIG. 9;

FIG. 11 is a front view of FIG. 9;

FIG. 12 is a rear view of FIG. 9;

FIG. 13 is a left side view of FIG. 9;

FIG. 14 is right side view of FIG. 9;

FIG. 15 is a top view of FIG. 9; and,

FIG. 16 is a bottom view of FIG. 9.

The details shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a bicycle helmet, as shown and described. 